| 摘要 |
An electric linear motion actuator is provided that generates little overshoot and has an excellent responsiveness. The electric linear motion actuator includes: an electric motor (15); a linear moving member (A) capable of moving between a standby position where the member (A) is spaced apart from a brake disk (2) with a predetermined clearance and a load applying position where the member (A) contacts the brake disk (2) to apply a load to the brake disk (2); a motion converting mechanism (B) that converts the rotational motion of the electric motor (15) into a linear motion of the linear moving member (A); a load sensor (14) that detects the magnitude of the load applied to the brake disk (2) from the linear moving member (A); and a controller (50) that performs feedback control on the electric motor (15) based on the difference between the load detected by the load sensor (14) and a load command value. The controller (50) reduces the number of revolutions of the electric motor (15) when the linear moving member (A) moves into a predetermined zone immediately before the position where the clearance between the linear moving member (A) and the brake disk (2) becomes zero. |
